Only when I left my parents for America ____ how much I loved them.
| A．I realized | B．I had realized | C．had I realized | D．did I realize |
Film has a much shorter history, especially when __________ such art forms as music and painting.
| A．having compared to | B．comparing with | C．compare with | D．compared with |
It is the educational system, rather than the teachers, _______ is to blame for the students’ heavy burden nowadays.
| A．who | B．this | C．that | D．whom |
---- Did he come back early last night?
---- Yes. It was not yet eight o’clock _______ he arrived home.
| A．when | B．that | C．before | D．until |
After a few days together, they got to the point _______ they could read each other’s thought.
| A．which | B．that | C．where | D．when |
________ I want to know, sir, is whether you have any goods in that bag _______ I should know about.
| A．What; that | B．What; what | C．That; what | D．That; where |