The word “excavated” is closest in meaning to_____
A.exasperated
B.extinguished
C.hunted down
D.dug up

According to the author, which of the following reasons disrupt travelers’ sleep?
A.Travelers try to sleep between 3-5 p.m.
B.Travelers’ attention is reduced by 75 percent
C.Travelers fly in the natural direction of their internal clock.
D.The traveler’s internal clock has to adjust to patterns of light and activity.

My father used to ................the importance of learning English. (emphasis)
A.emphasize
B.emphases
C.emphasized
D.emphasised

May Day is celebrated regularly in ............ countries. (society)
A.socialist
B.socialism
C.social
D.society

According to the article, ________
A.jet lag can affect different abilities differently
B.flying seriously affects your judgment and decision-making
C.travelers complain about the negative effects of flying
D.various factors stop us sleeping when we fly

The direction you fly in_______
A.extends or shrinks your body clock
B.alters your body’s natural rhythms
C.helps the degree of jet lag
D.affects the degree of jet lag

Jet lag______
A.makes our body clock operate badly
B.causes our body clock to change
C.extends the hours of our body clock
D.upsets our body’s rhythms

The main function of the body clock is to_____
A.help us sleep
B.help us adapt to a 24-hour cycle
C.regulate the body’s functions
D.govern all the body’s responses

Jack made me ................ him next week.
A.to promise to call
B.promise to call
C.to promise calling
D.promise calling

Do you enjoy ................ other countries?
A.visit
B.to visit
C.visiting
D.visited