It is very difficult to keep the trains( )on time in winter.

It get very cold here ____ winter.A. atB. withC. onD. in

[问答题]I hope we can have some snow this winter.

[问答题]I hope we can have some snow this winter.

Roses need special care ________ they can live through winter．A. becauseB. so th

Roses need special care _______ they can live through winter.A. becauseB. so tha

[单选题]It seems very difficult ________ .A.to stop the child to cry B.restraining

__, this book is not very difficult.A. Generally sayB. Generally sayingC. Genera

“It was a very ______ situation which was difficult to ______.”A. interesting; c

[单选题]To conserve energy, estate developers are encouraged to build houses that c

[单选题]This room ______ cool in summer and warm in winter. It's quite comfortable