--- I hear Robert has gone to Harvard University for his master’s degree.
--- Oh, how nice! Do you know when he ____?
| A．was leaving | B．left | C．had left | D．has left |
相关试题
His way of speaking suggested that he ____ very angry.
| A．should be | B．be | C．is | D．was |
Pine trees, of which there are almost one hundred ____, are found throughout the North Temperate Zone.
| A．species | B．samples | C．specimens | D．Standards |
The salmon dish was _______, wasn’t it?
| A．success | B．the success | C．a success | D．successes |
The conference had been held to discuss the effects of tourism ___ the wildlife in the rainforest.
| A．in | B．on | C． at |
D．with |
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