–Where are the students? How could they keep us waiting for so long? –They started an hour ago and they ____ be here in fifteen minutes, I think.
________ is often the case, some British people are not familiar with different cultures.
This drug is less likely to cause side effects when ________ late in the day.
You haven’t changed at all —— you still look________ the same as before.
The pollution in Beijing is expected to improve, ________ a series of air pollution control measures.
Life teaches us not to regret over yesterday, for it ________ and is beyond our control.