Chia động từ trong ngoặc ở thì hiện tại tiếp diễn

4.When I got to the station. John (wait) me for 10 minutes 
5.when John (arrive) here tomorrow ,i(call)...you
6.when you (come)...here at this time tomorrow. I (tidy)...the room up 
8.when it rains heavily, John usually (stay)...at home 
10. I (walk)...on the street when it rained 
11.john (stay)...anything since yesterday 
12.in a few days, there (be)...an important 
13.how many questions ...you (answer )so far
14.i (meet)... John . He (tell)...me about his trip to Singapore 
15.look! A boy (run)...after a little 
16.this is the best book i (ever read)...
17.what was the most in teresting story I (ever listen)... 
18.china (lie)...to the north of Viet nam