—Are you going to help him?—Why ___ I help him? He' s never done anything for me.
-These suitcases are too heavy for me to move.-Here, I'll give you a hand __________ them.
When he left the room, he __________ the door key to me.
The film's ending follows a set pattern, but,__________,it is worth seeing a second time.
__________ with conducting an interview by QQ online, a face-to-face interview in person can provide people with more reliable details.
Recently a survey __________ prices of the same goods in two different supermarkets has caused heated debate among citizens.