We should do what we can _______ those people when they are in trouble.( )
to help
helped
help
You____stop when the traffic lights turn red.( )
can't
may
must
needn't
Their parents don't allow them____in the river because it's really dangerous.( )
swim
swimming
to swim
swam
Please_____the TV. It's time to go to bed.( )
turn on
turn off
put on
put off
____people visited Hongyadong, Chongqing on May Day this year.( )
Thousand
Thousands
Thousand of
Thousands of
The cake_____delicious. I'd like to have another one.( )
tastes
looks
sounds
feels