Determining where we are _________our surroundings remains an essential skill for our survival.
| A． |
in contrast to |
B． |
in defense of |
C． |
in face of |
D． |
in relation to |
Bob called to tell his mother that he couldn’t enter the house, for he ________ his key at school.
| A．had left | B．would leave |
| C．was leaving | D．has left |
Because the shop _________, all the T-shirts are sold at half price in it.
| A．has closed down | B．closed down |
| C．is closing down | D．had closed down |
We ____very early so we packed the night Before.
| A．leave | B．had left |
| C．were leaving | D．have left |
—Jackie, could you please repeat what I said just now?
— Sorry, I ____.
| A．wasn’t listening | B．wasn’t to listen |
| C．hadn’t listened | D．wouldn’t listen |
I____ my homework at nine o'clock last Sunday morning.
| A．am doing | B．was doing |
| C．do | D．did |