The traffic accident ________ all of a sudden, but luckily the boy ________ to a safe place.
A. was happened; was taken B. happened; was taken
C. happened; was brought D. was happened; was brought
—He always appears to ________．
—That's because he's really knowledgeable and experienced.
A. make an effort B. have a point
C. pull together D. take place
I took her bag instead of mine ________．
A. by mistakes B. by mistake
C. with mistake D. with mistakes
At least more than 300 million people are using QQ ________ by Ma Huateng to chat online.
A. created B. was created
C. is created D. creating
Last night we didn’t have supper _______ my father came back home.
A. if B. until C. though D. because
—How long did Robert stay in San Francisco?
—For _______ three weeks.
A. hardly B. usually C. nearly D. mostly
