Thank you for sending us ____ fresh vegetables of many kinds. You have done us ____ a great service.
| A．不填；a | B．the；a | C．不填；不填 | D．the；不填 |
相关试题
Nowadays more young people have suffered from diabetes __________ it is generally realized.
| A．than | B．that | C．which | D．what |
The man didn’t know _________ the thief broke into the house and stole all his valuable things
| A．it was when that | B．when it was that | C．that it was when | D．was it when that |
There ________ no water for 2 days, the travellers were all thirsty.
| A．having been | B．had been | C．is | D．was |
Her father told her to be careful when _____ the street. 
| A．he is crossing | B．she is crossing | C．crossed | D．crossing |
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