1.Jack _____ his keys in the office ,so he had to wait until

1.Jack _____ his keys in the office ,so he had to wait until his wife _____ home.
A.had left;comes B.left; had come C.had left ;come D.had left ;would come
2.He (made up his nind to ) study hard and go into the best university in China .
A.learned it by heart to B.had a decision to
C.tried his best to D.planted to do
3.Water pollution is one cause of the _____(die) of the fish in the river.
4.Anna is better ____ math than any _____ her classmates.
A.for; other of B.at; other of C.for ;of D.at ;of
5.The film I saw yesterday is the best one _____ I've ever seen .
A .that B.which C.what D.of which