| A．how to | B．to | C．how |
| A．to | B．in | C．on |
| A．falls | B．falling | C．fall. |
| A．quite | B．quiet | C．quietly |
| A．thinking | B．think | C．thinks |
| A．to join | B．join | C．join in | D．to join in |
| A．as | B．for | C．by | D．like |
| A．as | B．for | C．to | D．like |
| A．successful | B．success | C．successfully | D．succeed |
| A．success | B．succeed | C．successful | D．successfully |
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