18的因数有______，24的因数有______，18和24的最大公因数是______，最小公倍数是______．

用括号内所给单词的适当形式填空.

1. In the last three years, they _____ (have) three major concerts.

2. He _____ (go) to Nanjing, and he will be back next week.

3. The rain _____ (stop). Shall we go on with our basketball match?

4. I have got a lot of books _____ (read) for the exam.

5. How long has the man been _____ (die)?