I don't know what to say at the interview．
____．Just be polite and answer honestly．（ ）
A．Don't mention itB．It's a pleasure
C．Don't worryD．OK，thanks
It is said that 5G is coming． It will improve our life great!
__________ amazing it is!（ ）
A．What anB．How aC．WhatD．How
Those young firemen were brave enough to __________ the fire in the forest．（ ）
A．work outB．put outC．hand outD．look out
What is your mother doing， Linda？
She ___________dinner in the kitchen now．（ ）
A．is cookingB．was cooking
C．cookD．cooking
__________ the help of modern technology， scientists got a photo of a black hole．（ ）
A．AtB．InC．OnD．With
Will you stay here for dinner with us？
Sorry， I ____________． My mother is waiting for me at home．（ ）
A．mustn'tB．can'tC．needn'tD．couldn't