﹣﹣When will Mr Liu come back to Zhenjiang?
﹣﹣Sorry, I don't know ________. ( )
how long he will stay in Xinjiang
how he went to Xinjiang
how soon will he be back from Xinjiang
why he is going to Xinjiang
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
What do you think of working as a doctor?
It 's a good job to help people keep___________.( )
A.busyB.strictC.healthyD.generous
Betty has a beautiful _________. She wants to be a singer in the future.( )
A.voiceB.lookC.noiseD.sound