【题目】Jane moved aimlessly down the tree-lined street, not knowing ______she was heading.
A.why
B.where
C.how
D.when

A. depressing; depressed B. depressing; depressing

C. depressed; depressed D. depressed; depressing

【题目】 ______ birds use their feathers for flight, some of their feathers are for other purposes.
A.Once
B.If
C.Although
D.Because

【题目】—______ that company to see how they think of our product yesterday?
—Yes. They are happy with it.
A.Did you call
B.Have you called
C.Will you call
D.Were you calling

A. a great many of B. a large amount of

C. a series of D. much

A. what B. that

C. when D. how

A. lack; taken up B. lacking in; taken in

C. a lack of; taken up D. lack; taken in

A. a; a B. the; the

C. a; the D. the; a

【题目】 Samuel, the tallest boy in our class, ______ easily reach the books on the top shelf.
A.must
B.should
C.can
D.need