1¡¢The weatherman said that it is ____ to rain, but not _____.

A. possible; probable   B. probable; possible

C. possibly; probable   D. probably; possibly

2¡¢He has _______good knowledge of _____English language but not much of English history.

A. / ; the   B. a; the    C. / ; /   D. the; the

3¡¢They climbed rocks, _____rivers and settled in the valley.

A. across    B. crossing     C. crossed     D. and crossing