— Has Sam finished his homework today?
— I have no idea. He ________ it this morning.
| A．did | B．was doing | C．has done | D．had done |
To stay awake, he finished a cup of coffee and ordered ______.
| A．the other | B．other | C．the others | D．another |
Graduation is a good time to thank those who have helped you ______ the tough years.
| A．through | B．up | C．with | D．from |
One Friday, we were packing to leave for a weekend away ______my daughter heard cries for help.
| A．after | B．while | C．since | D．when |
--- How’s your new babysitter?
--- We ______ ask for a better one. All our kids love her so much.
| A．should | B．might | C．mustn’t | D．couldn’t |
English is a language shared by several diverse cultures, each of ______ uses it somewhat differently.
| A．which | B．what | C．them | D．those |