用括号中词的适当形式填空。
1. Study hard and you _____ (do) well in Russian.
2. —_____ the dictionary _____ (give) to Li Ping?
—No, it is still in my schoolbag.
3. You _____ (keep) the magazine for two weeks, so it _____ (must, return) to the library tomorrow.
4. If it _____ (think) carefully, it will _____ (do) better.
5. My book ________(keep) on that shelf for two days.
1. will do 2. Has; been given 3. have kept; must be returned
4. was thought; have been done 5. has been kept