-How was the English evening party last night?
-It was great fun. You ______ come.
| A．should | B．must | C．may | D．can |
She always watches her son ________ the road every morning, or she will feel worried.
| A．crossing | B．cross | C．to cross | D．to crossing |
Finally, people found computers ________.
| A．useful | B．are useful | C．don’t useful | D．doesn’t useful |
They still can’t decide ________ with our difficulties in learning math.
| A．what to deal | B．how to do | C．what to solve | D．how to deal |
Everybody tells us we can’t pass the exam ________ we study hard.
| A．because | B．or | C．unless | D．and |
– How do you learn English, Tony?
– I usually practice English ________ chatting with my American friends.
| A．in | B．with | C．on | D．by |