It is _________ difficult work that we can't finish it in a short time.
------ He is late for the meeting. ------ ______. A. So am I B. So I am C. So I do
------ What a nice motorbike! How long have you ______ it? ------ About half a year. A. had B. receive C. bought
There are several chemical factories ______ waste water into the river. A. pours B. pour C. pouring
Jim has been to the Great Wall before, ______ he? A. has B. does C. hasn’t
The city has improved a lot _________ I came here a few years ago. A. sinceB. forC. when