_________he was poor himself, he tried his best to help the people in need.
句意：虽然他自己很穷，但是他尽力去帮助有需要的人们。
考查从属连词词义辨析。Because因为，引导原因状语从句；Though虽然，引导让步状语从句；After在……之后，引导时间状语从句。根据语境可知前半句是让步关系，所以用though引导让步状语从句。故选B。
_________he was poor himself, he tried his best to help the people in need.
______you smile at others, they will smile back.
—Michael, shall we go hiking in the mountains next Sunday?
—OK, ________it rains heavily.
The young men all shouted “Happy New Year” _______it was twelve o’clock.
You’d better tidy up your room ________ your father comes back.
A break between classes is very important for students because it ________helps with students' health by doing sports _______improves their social skills by communicating with their classmates.
You'd better make a good plan you take a holiday.
Cooking is an interesting lesson and we can make different dishes ________ we like.
—Would you like to play table tennis with me this afternoon?
—I'd like to. ________ I'm afraid I have no time.
Susan ________Tina are good friends.
