Our monitor, ______ it clear to us that he didn’t want to waste time playing computer games, left the Internet bar quickly.
The wild flowers looked like a soft orange blanket _______ the desert.
________ with so much trouble, we failed to complete the task on time.
The reform project _______ by Mr. White ________ at the meeting now.
Who________ for the pollution of our earth?
— So hard ______ in the past few months that he has made great progress in English. — I can see that; only a few mistakes ______ in the exam.