____________ appears considerably larger at the horizon than it does overhead is merely an optical illusion.
A.The Moon
B.The Moon which
C.When the Moon
D.That the Moon

____________ you have the money in your account, you can withdraw up to $100 a day.
A.Unless
B.Although
C.Provided that
D.As soon as

I couldn't believe that they were brothers. They were as different as _________
A.Mars from Jupiter
B.milk from honey
C.chalk from cheese
D.dogs and cats

The reason he wants to take a leaving of absence is that he needs a complete rest.
A.The
B.leaving
C.that he
D.complete

It is the writing English that causes difficulties to foreigners.
A.the writing
B.that
C.difficulties
D.foreigners

Foreign students who are making a decision about which school to attend may not know exactly where the choices are located.
A.are making
B.about which
C.to attend
D.the choices

Friendly though he may seem, he's not to be trusted.
A.He's too friendly to be trusted.
B.However he seems friendly, he's not to be trusted.
C.He may have friends, but he's not to be trusted.
D.However friendly he seems, he's not to be trusted.

When the unemployment rate is high, the crime rate is usually also high.
A.The unemployment rate and the crime rate are both higher.
B.The higher the unemployment rate is, the higher the crime rate is.
C.The unemployment rate is as high as the crime rate.
D.The high rate of unemployment depends on the high rate of crime.

I wish you hadn't said that.
A.I wish you not to say that.
B.If only you didn't say that.
C.I hope you will not say that.
D.It would be nice if you hadn't said that.

The ________ of the pagoda in the water was very clear and beautiful.
A.sight
B.shadow
C.reflection
D.mirror