. ---I am green at everything.
---Don’t worry. _____ you get older, you get more experience.
A .When B. Till C. As D While
When the party was over, he ______ his friends good-bye and ______.
| A．bade; departed | B．said; left |
| C．waved; went | D．remarked; retired |
________ doesn’t seem to have been any difficulty solving the problem.
| A．There | B．It | C．He | D．That |
Joan had often heard ____ said that Marley had no money.
| A．one | B．it | C．once | D．her |
Carl Linnaeus made great contributions to ________ plant species.
| A．group | B．have grouped | C．grouping | D．been grouping |
He observed a stranger _______ around the store at 12 p.m. last night.
| A．to hang | B．hang | C．hanging | D．to be hanging |