_______ they may have, the CEO of the corporation calls on all the staff to gather their courage to strive it.
| A．What a serious problem | B．However a serious problem |
| C．How serious a problem | D．Whatever a serious problem |
______ made matters worse was_______ their son’s disease was worsening.
| A．It; that | B．That; that | C．What; why | D．What; that |
Find ways to praise your children often, ____ you’ll find they will open their hearts to you.
| A．till | B．or | C．and | D．but |
—You can have a pet dog, but suppose you get bored with it in a few days? _____？
—We won’t, we promise!
| A．Then what | B．All right | C．How come | D．So what |
As the story______, the truth about the strange figure is slowly discovered.
| A．begins | B．happens | C．ends | D．develops |
Did you predict that many students ______ up for the dance competition?
| A．would sign | B．signed | C．have signed | D．had signed |