Only when he arrived home _____ that he had left his key in the office.
| A．will he realize | B．he did realize | C．did he realize | D．should he realize |
Joan together with her parents ____ going to visit the Summer Palace this Saturday.
| A．is | B．was | C．are | D．were |
The summer holiday is just ____ the corner. How do you plan to spend it?
| A．at | B．around | C．on | D．in |
____ hands and knees Helen Thayer got the tent up.
| A．In | B．At | C．With | D．On |
The woman looks so worried. She seems ____ something valuable.
| A．lose | B．losing | C．to have lost | D．having lost |
For women life sometimes seems ____ it is for men.
| A．twice as hard as | B．as twice hard as | C．as hard twice as | D．as hard as twice |