After four years’ research, we now have a ______ better understanding of the disease.

In my opinion , the thief is likely to come , please look _____ for him .

I’d like to make use of ______ more time to consider my decision.

He speaks English well indeed, but of course not ________ as a native speaker.

—Timmy, it is raining heavily out. Shall we stop here?—_______, we must finish this work today.