When Jim’s mother came in, he _______ his homework.A.is doing B.has done C.was doing
There_____ a large number of students in the hall, and the number of the students_____ more than 3000.
Yesterday I met Sandy. We ________ since ______ middle school.
We’d like to recommend Daniel ____ our monitor _____ his hard work.
____ big success the Taizhou Bridge is !
Titanic is _________ film I’ve ever seen.