题目内容
Up to now, our society ________ with limited living space and a shortage of natural resources.
| A．has been challenged | B．is being challenged |
| C．is challenging | D．has challenged |
A
解析
He _____ to us that those eggs which were _____ on the table had been _____ by snakes.
| A．lied; laying; lied | B．lied; lying; lain | C．laid; laid; laid | D．lied; lying; laid |
When to go for the on-salary holiday yet?
| A．are not decided | B．have not been decided | C．is not being decided | D．has not been decided |
—Lily is going to make a presentation in class this afternoon.
—Oh, really? I ________ it was Michael's turn.
| A．think | B．have thought |
| C．thought | D．am thinking |
—What's the matter with Philips?
—Something must have happened to him. He left home three hours ago, but ________ at the party!
| A．didn't arrive | B．isn't arriving |
| C．hadn't arrived | D．hasn't arrived |
It's said that they ________ a better life ever since they moved to the US.
| A．had enjoyed | B．have been enjoying |
| C．were enjoying | D．would enjoy |
We are glad to ________ you on the progress you have made.
| A．congratulate | B．celebrate |
| C．greet | D．appreciate |
After walking on the zigzag path to the mountain top for a few hours, the tourists gathered under trees ________ shade and ________ down to have a rest.
| A．provided; sit | B．providing; sitting |
| C．providing; sat | D．provided; sat |
—Joan，what ________ in your hand?
—Look！It's a birthday gift for my grandma.
| A．had you held | B．are you holding |
| C．do you hold | D．will you hold |