问题
his may sound like a simple process,great care is needed．
A:Since
B:Once
C:Although
D:Unless
B:Once
C:Although
D:Unless
正确答案是：
同类题型
I had not seen him for years,but I_________ his voice on the phone.
go straight On to university why not get some work experience first?
Look!There are some boats the river．
The club, 25 years ago, is holding a party for past and present members.
Is the film interesting—I thought it would be. But ______, it’svery boring.