— When do we need to pay the balance?
— ____ September 30.
A．In B．By C．During D．Within
______ and out of breath, we reached the top of the mountain and stopped _____ the beautiful scenery.
A．Tiring, to admire B．Being tired, admiring
C．Tired, to admire D．Tired, admiring
I greeted the teacher with “ hello”, and the teacher gave me a sweet smile ______.
A．by turns B．in return
C．in turn D．for turn
Do you know the trouble he had _____ the work?
A．on finishing B．to finish
C．having finishing D．finishing
A communicative satellite ______ as much as 3.5 tons was sent up into space last week.
A．weighing B．weighed
C．to be weighed D．being weighed
This is the first time we ______ a film in the cinema together as a family.
A．see B．had seen C．saw D．have seen
