Don’t touch anything in the lab unless____.
A. to be allowed B. allowed C, to be allowing D.allowed to
My niece used to live in __________ was known as “Lucky Community”.
| A．what | B．where | C．which | D．where there |
---- The free gift doesn’t look good.
----________, madam, but if you want good quality, you have to pay for it.
| A．No doubt | B．No offence | C．No problem | D．No way |
So far we have done a lot to build a low-carbon economy, yet it is still _________ ideal. We have to work even harder.
| A．far from | B．next to | C．out of | D．due to |
______ it rain heavily tomorrow, we would have to put off the visit to the Forbidden City.
| A．Were | B．Should | C．Would | D．Will |
________ repeatedly, the problem still appeared in the beginners’ homework.
| A．Explaining | B．Having explained |
| C．Having been explained | D．To be explained |