题目内容
Our knowledge is growing________.
[ ]
My sister enjoys playing ______ piano.
A. the B. a C. an D. /
Most international business letters ______ in English.
A. write B. is written C. are writing D. are written
从所给的四个选项中选择最佳答案
Your woolen sweater is used for________ warm.
A.keep B.kept
C.keeps D.keeping
It ________ every day so far this week.
The thermoses are used ________ people ________ keeping water hot.
He asked me ________ in maths.
A. others B. the other C. the others D. other
I ______ finish this work next month.
A. could be about to B. shall be able
C. shall be able to D. must can