________ your composition carefully, some spelling mistakes can be avoided.
A. Having checked B. Checking C. If you check D. To check
Ray is a new graduate, and it seems that he has difficulty in dealing with ________ problems arise.
A. whichever B. whenever C. whatever D. wherever
- These apples look very beautiful.
- They ________. See the price $ 3.99 a pound. Very expensive, aren’t they?
A. should B. would C. could D. might
- Have you known each other for long?
- Not really. ________ we started to work in this school.
A. Just after B. Just when C. Ever since D. Just before
________ with some research materials, he decided on three possible approaches in his experiment.
A. Preparing B. Prepared C. Having prepared D. Prepare
- Remember the first time we ________, Ed ?
- Of course, I do. You ________ a song on the stage.
A. have met; sang B. met; were singing
C. met; sang D. have met; have sung
