B)1.began 2.bought 3.lost 4.have finished 5.have made came 6.have known 7.went 8.cooked 9.have kept 10.have seen did see
C)1.but 2.and 3. so 4.while 5.or
三、1. Protecting environment
B)
began
bought
lost
have finished
has made;came
have known
went
cooked
have kept
have;seen
did;see
C)
but
and
so
while
or
三、
1. Protecting;environment
began
bought
lost
have finished
has made,came
have know
go
cooked
have kept
have,seen,did,see
but
and
when
while
or
全都不会做的话建议你去精》锐补补啦