parents often tell us not ___alon in the river in summer.

问题描述:

parents often tell us not ___alon in the river in summer.
Our parents often tell us not ___alon in the river in summer.
A swim
B to swim
C swimming
--Listen!Is Tom singing in the classroom?
--No.It___be Tom .He has gone to Paris.
A may not
B need not
C can not

1 B
2 C