You can think of many casesChinese students obviously know a lot of English words and expressions but can’t express themselves freely.

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

On snowy days, you have to drive very _____to avoid traffic accidents [ ]

s the noise It sounds as if it comesfrom upstairs –______ It must be thewindow-cleaner working , nextdoor

－It’s many years since I saw you last, I __________ you at all.－I wouldn’t have, either, if someone __________ you by the name