____________the outbreak of COVID﹣19 is a terrible blow to the country， the government is trying hard to bring the situation under control．（ ）
A．AlthoughB．IfC．Unless
Hello．This is Leo speaking．Is that John？
Sorry，he isn't in．__________．（ ）
A．Please hold on
B．May I take a message？
C．What are you saying to him？
China is carrying the two﹣child policy to avoid population problem．
________．We hope it can work well． （ ）
A．How good is the plan!
B．How good plan!
C．How good the plan is!
Rose cooks meals at home on Sundays．She never eats ________ her mother comes back and she'd like to enjoy it together．（ ）
A．untilB．whenC．after
He stood up and told the teacher________．（ ）
A．what is his nameB．what was his name
C．what his name was
Three years _______ and we've made so many friends during our junior school．（ ）
A．has passedB．has past
C．have passed