(2019宜昌)—________ do you put a lot of snakes into the forest?
—To protect the ecosystem.
A.Why B.Which C.How D.When
(2019连云港)After the new highspeed railway line began operations, the time on the trip from Lianyungang to Qingdao now is much less than ________ in the past.
A.one B.this C.that D.it
(2019重庆A卷)Their plants don't grow very well, but ________ look really good.
A.we B.our C.ours D.ourselves
(2019扬州)—Annie, ________ books are all over the place.
—Sorry, mum, I'll put them away.
A.you B.your C.yours D.yourself
(2019广东)Nobody taught the old lady how to use WeChat. She learned it all by ________．
A.she B.her C.herself D.hers
(2019云南)—________ sport will you take part in, Peter?
—The boys' 800meter race.
A.Where B.When C.Which D.How
