初中英语动词时态专项练习I.单项选择(每小题2分)1. The mother asked the boy _ down the ladder, but he went on _ instead.A. come; climbingB. to come; to climb C. to come; climbing D. coming; climbing2. Look! The boy _ with his mother in the pool.A. is swiming B. is swimming C. are swimming D. are swiming 3. - Dont forget to ask him to write to me. - I wont. As soon as he _, Ill ask him to write to you.A. will come B. came