With the help of high technology, many new substances（物质）______in the past years.
| A．discovered | B．have discovered | C．had been discovered | D．have been discovered |
The tables and pictures help make ________ clear ________I wasn't sure of before.
| A．it; for me to understand what | B．it; everything |
| C．everything; to understand what | D．/; what |
I know nothing about the match ________ I read in the newspaper.
| A．besides | B．expect | C．except that | D．except what |
— Would you like me to get you an English dictionary while I'm there?
—________. Thank you, anyway.
| A．But I have already got one | B．What a nice dictionary |
| C．But I have already got it | D．Yes, please |
I think this shirt fits you. You can try it on if you ________.
| A．are like | B．like to | C．like | D．have liked |
— Do you still remember when we went to Nanjing?
— I can't remember now but ________sometime last summer?
| A．might it be | B．could it be | C．could it have been | D．should it have been |