Unless ____ to speak, you should remain silent at the conference.
A invited B inviting C being invited D having invited
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The global warming is going to be a big problem and many people are wondering ________ we can do with it.
| A．if | B．how | C．that | D．what |
.
The little girl _______ reading her favourite book alone under the tree, while the rest _________ talking excitedly about their trip.
| A．was, was | B．was, were | C．were, was | D．were, were |
.
The manager and his assistants discussed the plan that they would like to see __________ the next year.
| A．carry out | B．carry on | C．carried out | D．carried off |
.
The boy asked his parents to buy him a pair of binoculars __________ which to watch football games.
| A．in | B．through | C．from | D．on |
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She is the only one of those women archaeologists who ________ chosen to go to Loulan.
| A．has | B．has been | C．have been | D．had been |