It is usually not quite cold in this area in March, but sometimes temperature be very low.
| A．should | B．can | C．must | D．shall |
____ several times, the young scientist still kept on doing his experiments.
| A．Having failed | B．Having been failed | C．Failed | D．To fail |
It was last October ____ they finally came back to their hometown.
| A．when | B．that | C．what | D．until |
My pen is missing I can’t find ____ anywhere.
| A．one | B．this | C．that | D．it |
Had I learnt English well, I ____ interview for the job tomorrow.
| A．would take | B．would have taken |
| C．must take | D．could be taken |
I think the answer is right but I’m not ____ sure about it.
| A．exactly | B．absolutely |
| C．particularly | D．eventually |