It has been proved ____ several new kinds of medicine____ a positive effect on the cure of H7N9.
| A．which，has | B．if, has |
| C．that, have | D．what, have |
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You’d better not phone me between two and six o’clock this afternoon; I ___
a speech then.
| A．will give | B．will have been giving |
| C．will be giving | D．will have given |
With tags(标签) _____ to the luggage, it won’t take long for the passengers to find theirs correctly..
| A．attaching | B．attached | C．to attach | D．attaches |
Mr. White graduated from _____ Cambridge University with a degree in ____ physics.
| A．the; a | B．a; a | C．a; the | D．/; / |
Mr. Black is very happy because the clothes made in his factory have never been .
| A．popular | B．more popular |
| C．most popular | D．the most popular |
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