She looks sad. Could you please tell me ____ that prevents her from being as happy as before?
A.what it is B.it is what C.how it is D.it is how
In any unsafe situation, simply ________ the button and a highly-trained agent will get you the help you need.
A.press B.to press
C.pressing D.pressed
I __________ to send Peter a gift to congratulate him on his marriage, but I couldn’t manage it.
A.had hoped B.am hoping
C.have hoped D.would hope
They are trying to make sure that 5G terminals ________ by 2022 for the Beijing Winter Olympics.
A.will install B.will have been installed C.are installed D.have been installed
I hate _______ when people talk with their mouths full.
A.it B.that C.these D.them
I suggested the person______to be put into prison.
A.refers B.referring C.referred D.refer
