— 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
Tao Yuanming's simple and direct writing was different from the writing style of his time. He was ________ the rules.
A.too brave to break B.too brave to follow C.brave enough to break D.brave enough to follow
