It is _______ he often fails in exams ______ makes his parents worried about him.
| A．what; that | B．that; what | C．that; that | D．because ; that |
______in the heart of Toronto is the Canadian National Tower, ______ is often called the CN Tower for short.
| A．Located, where | B．locating, which |
| C．locating, where | D．located, which |
To save class time, our teacher has ______ students do half of the exercises in class and complete the other half for our homework
| A．us | B．we | C．our | D．ours |
—Do remember to take this medicine three times a day with warm boiled water.
--- ________
| A．Heard it | B．Made it | C．Got it | D．Taken it |
There is no perfect person, some people have made _____success of themselves in spite of what would appear to be ______ weakness in their professions.
| A．/, a | B．a, / | C．a, a | D．/, / |
I think you should complain, _____, of course, you are happy with the way things are.
| A．until | B．although | C．when | D．unless |