Our school has developed a learning system students can do a lot of teamwork.
A vast area north of the Yangtze River ______by the first heavy SNOW of the new year,causing difficulties to the post-festival road transport.
Being examined twice a year,whether it is a car or a bus or a truck,is the rule that every driver _______obey in this city.
— Do you have my passport, Janet? — Yes, I have ________right here, in the locker.
The cakes are delicious. He’d like to have _____ third one because _____ second one is rather too small.
Emergency line operators must always _____ calm and make sure that they get all the information they need to send help.