I worked on the problem ____ a long time and I worked it out ____ myself ____ last. |
A. for; by; at B. in; with; on C. on; by; in D. for; for; at the |
The doctor worked ___ five hours ___ a rest. |
A. for; with B. on; without C. about; having D. for; without |
He arrived ___ Shanghai ___ 9: 30 ___ March 5. |
A. at; in; at B. to; on; at C. in; on; at D. in; at; on |
He often goes ____ school ____ six thirty ____ the morning. |
A. for; to; in B. to; at; in C. to; for; at D. for; at; to |
— We can use MSN to talk with each other on the Internet. — Really? Will you please show me it. |
A. what to use B. how to use C. how can I use D. where can I use |