Leonardo da Vinci(1452-1519)__________ birds kept in cages in order to have the pleasure of setting them free.
| A．is said to be buying | B．is said to have bought |
| C．had said to buy | D．has said to have bought |
Don’t quarrel with your friend, ________will damage your friendship．
| A．who | B．which | C．that | D．what |
The White Horse Temple in Luoyang is one of the first historic buildings________ to receive special state protection.
| A．listed | B．having been listed | C．being listed | D．listing |
—Some English idioms are difficult to understand.
—Exactly, ________ you know the meaning of each word.
| A．if only | B．even if | C．as if | D．now that |
. Whether ways will be found to stop pollution or not is just ______ worries the public.
| A．which | B．that | C．what | D．where |
What a pity! I _____ in London for three more days, but something urgent needed to be dealt with back in Beijing.
| A．must have stayed | B．could have stayed | C．may have stayed | D．needn’t have stayed |