Why don't the doctors stop ______ lunch？
Because they are busy ______ a patient．（ ）
| A． |
to have； to save |
B． |
having； saving |
| C． |
to have； saving |
D． |
having； to save |
Why don't the doctors stop ______ lunch？
Because they are busy ______ a patient．（ ）
| A． |
to have； to save |
B． |
having； saving |
| C． |
to have； saving |
D． |
having； to save |
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