The woman, when ______ how her husband was injured, began to cry.
| A．ask | B．to ask | C．asking | D．asked |
In our class, the student leaders are on duty every few days.
| A．the; a | B．/; a | C．/; / | D．The; / |
by a policeman, the children crossed the street safely.
| A．To lead | B．Lead | C．Leading | D．Led |
snacks and drinks, but they also brought cards for entertainment when they had a picnic in the forest.
| A．Not only they brought | B．Not only did they bring |
| C．Not only brought they | D．Not only they did bring |
Jim went to answer the phone. , Harry started to prepare lunch.
| A．However | B．Therefore | C．Besides | D．Meanwhile |
It took them time to finish the challenging task.
| A．a number of | B．a lot | C．a great deal of | D．a good many |