It’s high time that we gave ______ attention to our world climate and led a low-carbon life, or the consequence would be too serious for us to face.
| A．effective | B．gradual | C．due | D．temporary |
Please remind ______ he said he was coming. I may be in time to meet him.
| A．where | B．when | C．how | D．what |
Adam left word with my wife ______ he would call again in the afternoon.
| A．who | B．as | C．that | D．which |
. -- Do you think Allan came by taxi?
-- No. If he had, I don't believe he ______ his bike here.
| A．would leave | B．left | C．would have left | D．had left |
The road becomes so crowded during rush hours, ______ it becomes a very slow route.
| A．which | B．when | C．where | D．that |
-- The classroom looks like a mess!
-- Yes, but who left the waste paper ______ around?
| A．lie | B．to lie | C．lay | D．lying |