It is very important for a firm or a company to ______changes in the market.
A.keep pace with
B.keep pace of
C.keep trach with
D.keep in touch with

According to a recent survey, most people are on good_____ with their neighbors.
A.relations
B.terms
C.acquaintance
D.relationships

“Would you like some beer?” “Not while I’m_____"A.in order
B.on duty
C.under control
D.in the act

We expected her at nine but she finally _____at midnight.
A.came to
B.came off
C.turned up
D.turned out

I can’t go with you today; I have_____ things to do
A.a great deal
B.many a great
C.great many
D.a great many

He always did it well at school ______having his early education disrupted by illness.
A.in spite of
B.on account of
C.in addition to
D.even though

He objected to_____
A.his mistakes being laughed at
B.laughing his mistakes at
C.his mistakes laughing at
D.his mistakes at laughing

Read the passage carefully, then choose the correct answer.
There is one planet that still fascinates and teases scientists mainly because it doesn't have an atmosphere to obscure observation, yet it is not big enough for sufficiently accurate telescopic observation. The fact that it is also very close to the sun also makes it difficult for astronomers.
However, space telescopes have told us a lot more about Mercury. It is rather similar to Earth's moon and to Mars. There are mountainous areas dotted with craters and large valleys which are uncratered. The moon's valleys have fewer cracks and the ridges are smoother. Mercury's valleys are filled with volcanic rocks, similar to on the moon, yet there is no evidence of volcanoes, even extinct ones, on Mercury, as there is on the both Mars and the moon, and of course here on Earth.
So, scientists presume the valleys on Mercury were caused by different things, that is to say not by volcanoes, but by very large meteorites, which also caused the cracks in the terrain and left the ridges rough and uneven. More and better photos of Mercury are needed to prove what are at present at best only hypotheses.
What does the author imply space telescopes can do better than land-based telescopes?
A.Show the volcanoes on Mercury.
B.Show the meteorites which hit Mercury.
C.Show what caused Mercury's valleys.
D.Show more of the planet, Mercury.

Choose the sentence which is closest in meaning to the printed one.
She is unqualified to fill the position as executive secretary of the firm.
A.Both she and the executive secretary have a firm position.
B.She possesses the firm qualities of an executive secretary.
C.Firmness is needed to qualify one for position of executive secretary.
D.The job of executive secretary requires more skills than she has.

Choose the sentence which is closest in meaning to the printed one.
The children looked forward to getting new clothes for Christmas.
A.The children expected new clothes as Christmas gifts.
B.The children wanted to wear new clothes on Christmas Day.
C.The children looked for new clothes for Christmas.
D.The children got dressed for Christmas Day.