Only in digital form ________it is used, Bitcoin can be bought in cash.
| A．although | B．while |
| C．as | D．when |
Experience of this kind in both the U.S. and Europe well before the Second World War.
| A．have conducted | B．have been conducted |
| C．had conducted | D．had been conducted |
—My teacher says she’s canceling the class play. I just can’t understand.
—______.You were looking forward to it.
| A．It doesn’t matter | B．It’s very unwise of her |
| C．Don’t worry about it | D．You must be disappointed |
-Pity you missed the lecture on nuclear pollution
.
-Iit, but I was busy preparing for a job interview.
| A． | attended | B． | had attended |
| C． | would attend | D． | would have attended |
It was April 29,2011____Prince William and Kate Middleton walked into the palace hall of the wedding ceremony.
| A．that | B．when | C．since | D．before |
Last month, the Japanese government expressed their thanks for the air theyfrom China.
| A． | receive | B． | are receiving | C． | have received | D． | had received |