We'll go to the Great Wall if it ___________ rain tomorrow.
[ ]
A. doesn't B. isn't C. will D. won't
The woman went out, ___________ a baby __________ her back.
A. had, on B. with, on
C. /, over D. having, in
My parents used ________ they had to buy me a computer.
Today she ________ a red coat.
Recorders are used ___________ our students' listening ability (能力).
A. to help improving B. to helping to improving
C. to help improve D. helping to improve
____________ trying, and you'll make even greater progress.
A. Keep in B. Keep with
C. Keep on D. Keep of
Of the three foreign guests, one is from London, ________ two are from New York;
The old people ________ in the place.
The villagers are not ________ young trees for fire wood.
________Marx met Engels and they became close friends .