The children were catching butterflies in the garden. Some caught a lot, and others caught _______ at all.
| A．nothing | B．none | C．no one | D．neither |
— Should people stop using their cars and start using public transport?
— __________. The roads are too crowded as it is.
| A．All right | B．Exactly | C．Go ahead | D．Really |
When the spaceship traveled above, __________ new-looking earth appeared before us, ______ earth that we had never seen before.
| A．a; an | B．the; an | C．/; the | D．a; the |
— What can I do for you?
— This dress is too small. Is it _____________ in a larger size?
| A．convenient | B．available | C．accessible | D．comfortable |
He is only too ready to help others, seldom____, refusing them when they turn to him. 
| A．if never | B．if ever | C．if not | D．if any |
Many people have been ill from a strange disease these days, _____ we’ve never heard of before.
| A．it | B．that | C．one | D．this |