At the age of 29, Dave was a worker, ________ in a small apartment near Boston and ________ what to do about his future.
Miss Wilson, whose parents are____ working in China, is studying in Peking University now.
---What do you think worries him so much? ----____.
Someone must have taken it away this morning, ____?
Neither Rose nor Henry likes to attend the meeting, ____?
If a student can make what has been learned____ whether in class or from social practice, he will make steady progress.