Your colleague’s spoken English is quite good，Amy.—No wonder，as she________in the USA for two years

I’ll never forget the days ______ we spenttogether.

Her throat has been operated on, _____, she has to give up singing[ ]

It was at the very beginning____ Mr. Smith made a decision ___we should send for a doctor．

You may watch TV this evening, _____ you must finishyour homework first.