They thought ________ important to look left and right when ________ the road.
—Haveyouever been toSingapore?—Yes.I therelastyearwithmy parents.
of the coats made of cotton. They feel comfortable.
It’s necessary for you _____ exercise every day.
—I have _________ told your phone number. Has he called you ________?—No, he hasn’t called me _________.
The population of Shanghai is larger than _____ of Shenyang.