问题
w that a smile is usually a sign _____ people feel friendly and happy, but _____ we don’t know who the new person is
A:that; what if
B:when; what
C:when; how about
D:if; how;
B:when; what
C:when; how about
D:if; how;
正确答案是：
同类题型
There is no way to get to the small island where my grandparents live _____ by boating
It is usually not quite cold in this area in March, but sometimes temperature________ be very low.
We are ______the people in need are helped in time.
k! What are those boysdoing ______ the table—Well, they are playing cards