1. The robber hid behind the big tree as he watched the old lady ______ the front door of her house.

2. The injured man ______ on the pavement waiting for the ambulance to arrive.

3. Please give me a week to ponder ______ your proposal.

4. Vincent had left for his studies in England. I ______ in touch with him since then.

5. The PE teacher, together with his pupils, ______ round the school compound every Wednesday.

6. Not only did she sweep the floor, but she also ______ it.

7. Timothy seldom speaks German in Singapore, ______ he?

8. ______ did Isabel expect such warm applause from the audience for her first singing performance.

9. During a birthday celebration, Mr and Mrs Wong introduced a friend of ______ to my uncle.

10. No sooner had Jane stepped into the classroom ______ the school bell sounded.