Everyone has periods in their lives __________ everything seems very hard.
| A．when | B．where | C．which | D．that |
The time he has devoted in the past ten years ________the disabled is now considered _______of great value.
| A．to help; being | B．help; to be | C．to helping; to be | D．helping; being |
When we put the suggestion to him, he thought highly of it and was ______ about its immediate application.
| A．curious | B．content | C．cautious | D．enthusiastic |
This year the company has produced as many cars as the year before last, but the total profits are four-fifths ______ they were then.
| A．that | B．what | C．which | D．when |
When my parents were young, they had to ______ several miles every day to school since they had no money to buy a bike.
| A．occupy | B．cover | C．get | D．make |
Knowing office rules, whether ______ or not, is always of great importance, especially for young job seekers.
| A．written | B．writing | C．being written | D．having been written |