【单选题】
There were dirty marks on her trousers ___ she had wiped her hands.
【单选题】
People at the party worried about him, because no one was aware ______ he had gone.
【单选题】
But the Internet can bring some ________ effects, too. The most common one, some teenagers are addicted to computer games on the Internet.
【单选题】
If Linda had practised hard enough last week,she______ more confident on the stage now.
【单选题】
During the Second World War, once before, the U-boats had been _____ because of air attack.
【单选题】
After the Minister of Education had finished speaking at the press conference, he was made ______ all sorts of awkward questions.
【单选题】
They _ on the programme for almost one week before I joined them, and now we on it as no good results have come out so far.
①
had been working; are still working
②
had worked; were still working
③
have worked; were still working
④
have worked; are still working
【单选题】
People at the party worried about him, because no one was aware____ he had gone.
【单选题】
One-room schoolhouses can still be found in ___ areas where there are no other schools for many miles.
【单选题】
The postage rate was high in the past, because post offices had to send many people to_________ the postage.