The rivers will become dirtier and dirtier________ we take action to protect them.
A.since | B.if | C.until | D.unless |
---Would you like some more rice? ---______. I’m full.
A.No, thanks | B.Yes, thank you | C.I’d love to | D.Yes, please |
I won’t buy it because it’s too ______.
A.expensive | B.more expensive | C.most expensive | D.much expensive |
There’s some litter on the floor. Please ______.
A.pick up it | B.pick it up | C.pick them up | D.pick up them |
---What’s your favorite ______? ---Hamburger.
A.food | B.drink | C.fruit | D.clothing |
My friend Max started to play football ______ he was seven years old.
A.since | B.when | C.if | D.while |