So far, all of the infected people are thought _______ the flu after direct contact with sick birds.
A.to have caught | B.having caught | C.to catch | D.being caught |
When ________ to danger and conflict, men tend to increase blood pressure, ________ nervous and anxious.
A.exposed; felt | B.exposed; feeling | C.exposing; feeling | D.exposing; felt |
It’s too bad that I failed in the math exam. If only I ______ hard at it!
A.worked | B.had worked | C.has worked | D.would work |
The last decade of the 21st century ________ the rapid, steady development of China in various fields.
A.witnessed | B.was witnessed | C.is witnessed | D.had witnessed |
---He should have been warned of the danger.
---_______, but he wouldn’t listen to me.
A.So he had | B.So had he | C.So was he | D.So he was |
The teacher asked the two students to discuss the question in a low voice ________ they should bother the others.
A.so that | B.in case | C.in order that | D.now that |