Both Lily and Lucy ______ to the party yesterday,but they didn't come at all.( )
were invited
was invited
invited
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