| A．saw； play | B．saw; playing |
| C．see; playing | D．see; plays |
| A．stop | B．wait |
| C．go | D．pass |
| A．on； for | B．in； as | C．on； with |
| A．were； was | B．were; were | C．was； were |
| A．smoking | B．smok | C．smoke |
| A．Did； visited | B．Did； visit | C．Do； visited |
| A．had; riming | B．have； running | C．had； running |
| A．excited; exciting | B．exciting; exciting | C．exciting; excited |
| A．What; collect | B．What; collecting |
| C．How； collecting | D．How； collect |
| A．Do; in | B．Did; on |
| C．Does; in | D．Do; on |
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