1．Look！It (rain) hard outside.It seldom (rain) this time of the year.
答案：is raining; rains
2．This is his computer. He often (use) it to surf the Internet, but
he (not use) it now.
答案：uses; isn’t using
3．Hurry up, Garry. The train (leave) in half an hour.
答案：leaves/is leaving
