Having got up late this morning, Mike ran as fast as he could _______ to catch the bus.　

With ____ leaves ____ in the earth every year, the soil becomes richer and richer.

He is always serious and doesn’t like _____.

The students pretended_______ attentively when the teacher came in.

___what they have achieved in the past five years, we still have a long way to go.

________ the same mistake again made his parents very angry.

His room needs _______,so he must have it ________.

They told me that the museum was well worth        .

We have new work         tomorrow, so we should have all this work        .

As the mid- examination is coming , the students are busy ____ it.