-Has Tommy finished his homework yet?
-I have no idea； he ____ it this morning.
| A．was doing | B．had been doing | C．has done | D．did |
Not giving up when meeting with difficulties is a good quality, ______ you can benefit from.
| A．what | B．that | C．one | D．the one |
You can stay there for as long as your supplies of food and water can ________.
| A．hold up | B．hold on |
| C．hold back | D．hold out |
Time is pressing; it’s impossible for me to get there in an hour, ________ the possible delays.
| A．accounting for | B．answering for |
| C．allowing for | D．heading for |
_____ to improving services, we will provide customers with all the information they need.
| A．Being committed | B．Having committed |
| C．Committed | D．Committing |
That’s why, as a country, we offer temporary unemployment insurance – so that job-seekers don’t fall into poverty, and _________ when they get that job, they bounce back more quickly.
| A．therefore | B．because |
| C．in case | D．so that |