Only when___________ according to the directions can the medicine be quite effective.
| A．taking | B．taken | C．being taken | D．having been taken |
＿＿＿＿＿, you have given me a lot of help.
| A．Tell the truth | B．To tell the truth | C．Telling true | D．Telling truth |
—— Coffee ＿＿＿＿＿ milk?
—— Only milk, please, ＿＿＿＿＿ I used to like coffee.
| A．and； and | B．and； but | C．or； and | D．or； but |
Father advised me not to say anything until＿＿＿＿＿ at the meeting.
| A．asking | B．to ask | C．asked | D．ask |
You’re＿＿＿＿＿your time trying to persuade him. He’ll never join us.
| A．spending | B．wasting | C．losing | D．missing |
Well, we have been waiting here＿＿＿＿＿for the guest.
| A．long time | B．a long time | C．the long time | D．some long time |