I certainly didn’t appreciate （ ） when I made mistakes.

Scientists say it may be five or six years （ ） this medicine is tested on human beings.

（ ） we can succeed or not depends on how well we cooperate with others．

We’re talking about the piano and the pianist （ ） were in the concert we attended last night.

Fast food doesn’t seem like a good idea, for it is （ ）.

Many young people find it harder to appreciate_____music than pop music.

The football player is hoping to（ ）to another team soon．

（ ） weather may be too hot to the tourists.

All the traveling _____ are to be paid by the company if you travel on business.

These tickets for the performance are （ ） until the end of the month．

The shy girl felt quite （ ） and uncomfortable when she could not answer the interviewer’s question.

—Shall we invite Tim? —No， it’s too late to invite any more people. _____， he hates parties， you know.