Amy insists that she ____ the secret to lose weight. But she won’t share it with us.
A．had discovered B．discovers
C．has discovered D．will discover
We should make the world be aware of the fact that the land hunger ____ population growth before we carry out our population policy.
A．contributes to B．leads to C．results in D．results from
There is a growing_____of interest between her position and her business activities.
A．demand B．concern C．awareness D．conflict
—Can I pay the bill by check?
—Sorry,sir.But it is the management rules of our hotel that payment ____ be made in cash.
A．can B．will C．shall D．may
I am really worried about _____ I have hurt his feelings, though I didn’t mean to.
A．whether B．what C．if D．how
The reason ____ their failure you know is _____ they didn’t get fully prepared for the experiment.
A．why; that B．that; why C．for; that D．why; because
