So______that many parents are too worried to let their children travel alone at the beginning of the new term.

Did you have fun in the countryside yesterday—Yes ._______,we felt cold and tired in the end.

With so much noise of the traffic, I couldn’t ______ and do my research work.[ ]

hese words, he ______a wide-mouth jar from hispocket and set it on the table in front of him

tomorrow, we will set sail for Canada.