21．While ________ the dog, you were careless and it got loose and was hit by a car.
A．walk B．walking C．to walk D．walked
22．I don’t want to _______ a series of facts in a diary as most people do…
A．lie down B． set down C．calm down D．settle down
23．Native English speakers can understand each other ______ the don’t speak the same kind of English. k+s-5#u
A．if B．as if C． even if D．as long as
24．English is also spoken in Singapore and Malaysia and countries in Africa ______ South Africa.
. A．such as B．for example C．as D．namely
