1.I feel sad _____ rainy days.
问题描述：
1.I feel sad _____ rainy days.
A.on B.in C.at
2.Have you ____ a hotel reservation.
A.have B.make C.made
说明原因.
答
1.A 因为rainy修饰days,所以用on
2.C 现在完成时have done,变成疑问语序把have提前