It was raining heavily. Little Tom felt cold, so he stood ______ to his mother.

Two middle-aged passengers fell into the sea. _______, neither of them could swim.

 I won’t call you ______ something unexpected happens.

I would like to give you some money, but _______I haven’t got any.

Interviews were carried out ________ over the telephone，via e－mail or fax or face to face in four cities including Beijing，Shanghai，Guangzhou and Wuhan.