He____ in London for many years, but he has never regretted his final decision to move back to China.
| A．lived | B．was living | C．have lived | D．had lived |
—What a lovely boy he is!
—Yeah．He ______ memories of my childhood．
| A．called out | B．called for | C．called up | D．called on |
Scientists have shown that there is a connection ____ cigarette smoking and certain diseases.
| A．with | B．between | C．to | D．on |
Most of the universities in China provided scholarships for students ______ financial aid. 
| A．in favor of | B．in honor of | C．in face of | D．in need of |
In the experiment the scientist kept a watchful eye________the developments and recorded every detail.
| A．in | B．at | C．for | D．on |
He has some trouble ______ his classmates, but he has no trouble ______ doing his lessons.
| A．with; with | B．in; in | C．with; in | D．in; with |