问题

________is no doubt that today greenhouse gases are the largest human influence on global climate

A:It
B:There
C:This
D:That

正确答案是：

同类题型

as gone to Califonia—Oh, can you tell me when he

On the right on TV____, the China’s first female astronaut who had been sent up into space on June 29,2012.

_____ from his accent, he must be from Hunan.[ ]

He waited for __________ seemed like an hour before he finally got the ticket.

______do you live from your school — Ten minutes’ walk.