Tom has been out of work for two years, so he has difficulty______.
| A．earning living | B．earning his living | C．to earn livings | D．to earn his living |
Most birds find it safe to sleep in the trees,butthey have eggs or young chicks,they don't use a nest.
| A． | why | B． | how |
| C． | unless | D． | where |
By serving others,a person focuses on someone other than himself or herself,_______can be very eye-opening and rewarding.
| A．who | B．which |
| C．what | D．that |
Cathy is taking notes of the grammatical rules in class at Sunshine School,where sheEnglish for a year.
| A． | studies | B． | studied |
| C． | is studying | D． | has been studying |
We live day by day,but in the great things,the time of days and weeks_______so small that a day is unimportant.
| A．is | B．are |
| C．has been | D．have been |
As the light turned green,I stood for a moment,not,and asked myself what I was going to do.
| A． | moved | B． | moving |
| C． | to move | D． | being moved |