【題目】Wang Dong didn't go to school yesterday ________ he was ill.
A.so
B.if
C.because

A. care for B. cares about

C. takes care D. take care of

【題目】_______ we don't save water, we will have no water to drink one day.
A.Where
B.When
C.If

【題目】— How was your climbing Mount Huang?
— I didn't believe I could do it ______ I got to the top.
A.until
B.while
C.after

A. is better for B. is better with

C. is better at D. is better to

A. of B. at C. by D. in

【題目】— _______ I finish my homework now, Mom?
— No, you __________, you may do it after dinner.
A.Must; can't
B.Must; mustn't
C.Must; needn't

A. reached B. arrived in

C. arrive at D. get to

--I think it is colorful, ______ I am always busy.

A. if B. though C. while D. until

【題目】— Do you climb mountains every day?
— Yes, _____ a little exercise. I'm so out of shape.
A.getting
B.to get
C.get