Mark needs to learn Chinese _______ his company isopening a branch in Beijing.

Have you read thisbook — Yes. But that one is ________ worth reading.

Do you want another drink— __________.

We could hear the birds ________ in my hometown in the past, ________ now we can’t.

Mum, shall I leave today’s homework till tomorrow–Better not, dear. Never ______ what you can do today till tomorrow.