We’d be very grateful if you could join us because your cooperation will________the timely completion of our project.
| A．reach for | B．make for | C．go for | D．stand for |
--- May I smoke here?
--- If you , choose a seat in the smoking section.
| A．should | B．could | C．must | D．may |
The government has taken measures air quality.
| A．to improve | B．improved | C．being improved | D．to be improved |
a little money, Jane was able to buy her mother a lovely new watch.
| A．To save | B．Saving | C．Saved | D．Having saved |
From the dates on the gold coin, we know that it was made 500 years ago.
| A．marking | B．marked | C．to mark | D．to be marked |
--- Haven’t I told you that you should be home earlier?
--- Yes, but I home earlier than I usually do.
| A．was coming | B．will come | C．came | D．had come |