— How long is it ______ you picked up your badminton training?— It was not until my finance became better in last December ______ I started the training.

A bit more effort, I think, ____ the problem could be settled.

________ my teacher didn't tell me directly, I still felt that I didn't live up to her expectation.

Could it be in the restaurant       you had dinner with me yesterday       you left behind your wallet?

Children’s brains can’t develop properly_______ they lack protein.