— I want to help Joey with Chinese, since he has just moved here from America.
— ________, Joey's mother is a Chinese, so he speaks Chinese well.
A.Don't teach fish to swim B.Don't try to run before you walk
C.Don't burn the candle at both ends D.Don't put all your eggs in one basket
— Li Yan is worried about her father who has joined the medical team to Russia.
— What a brave hero! I wonder ________.
A.how long he has been to Russia B.how soon he'll return from Russia
C.how many times he has been in Russia D.whether he has gone to Russia before
The old lady next door asked Henry to help her fix the window yesterday. Henry didn't feel well, but she was too old to fix it herself, so he ________.
A.remained B.regretted C.allowed D.agreed
The latest report Food Security in China shows the government's success in feeding its growing ________ and its plans to improve food quality.
A.pollution B.population C.production D.pronunciation
—Dad, I've tried my best but I still can't solve these problems.
—Don't worry, my son. No one is ________ and everyone fails from time to time.
A.successful B.confident C.perfect D.excellent
"Don't go to Wuhan ________ it's really necessary," Zhong Nanshan, a famous expert said to the public. But he rushed to Wuhan by train to fight against the virus.
A.unless B.when C.since D.although