______ takes a lot of concentration and a great sense of balance to stay on it.
A.It | B.This | C.What | D.That |
He was convinced on the basis of he had experienced by then that there would be a long and difficult struggle.
A.why | B.what | C.how | D.which |
Among the competitors, there are three little girls , is Mary.
A.the smallest of whom | B.the smaller of whom |
C.the smallest of them | D.the smallest one |
------__ you got the news that the rocket was sent up successfully?
------From the radio.
A.How was it that | B.How it was that |
C.What was it that | D.What it was that |
________ it rain tomorrow,we would have to cancel the football match.
A.Were | B.Would | C.Will | D.Should |
The cost of renting a house in Beijing is higher than___in any other city of China.
A.one | B.it | C.that | D.this |