I didn’t manage to do it_________ you had explained how.
| A．unless | B．until |
| C．when | D．since |
Mr．Smith gave the attendants a wonder lecturethe company in the international conference.
| A．on behalf'of | B．owing to |
| C．in the place of | D．standing for |
Please don't call me at the office it's really necessary．
| A．if | B．unless | C．otherwise | D．except |
---Learning a language isn’t easy． It takes time．
--- I agree．. There's no short cut．
| A．All roads lead to Rome | B．Rome wasn't built in a day |
| C．Practice makes perfect | D．Slow but sure wins the race |
“I her a long time ago,” he doubted, “She doesn’t look at all familiar.”
| A．might have met | B．should have met |
| C．might meet | D．should meet |
This is the third book that he has written in the past five years, the first of I really enjoyed.
| A．which | B．that | C．those | D．them |