The central provinces have floods in some years，and .
| A．others in droughts | B．droughts in other |
| C．in others droughts | D．droughts in others |
There was ______ time _________ I hated to go to school.
| A．a, which | B．a, when |
| C．the, which | D．the, when |
Do you have any difficulty ________?
| A．on listening | B．to listening |
| C．for listening | D．in listening |
Many people agree that ___ knowledge of English is a must in ____ international trade today.
| A．a, 不填 | B．the, an |
| C．the, the | D．不填，the |
—What is your plan for the holiday, Paul?
—I’ll go on a trip to Yunnan Province with my family.
—_____.
| A．Have a nice time | B．Good luck |
| C．Come back soon | D．Congratulations |
He always brings me a pretty gift ____ he comes to visit me.
| A．by the time | B．sometimes |
| C．every time | D．at times |