The students stopped __________ when the teacher came in.
| A．to talk | B．talking | C．talked | D．Talk |
Tell her _____________ the radio.
A．turn down B．turning down C．to turn down
I feel it useful _________English.
A．to learn B．learn C．learning
I prefer ________his new idea.
A．try out B．to try out C．trying out
He wanted _________ an inventor .
A．to be B．being C．is
___________ is better than to receive.
A．To give B．Give C．Have given