593.A strong earthquake ____ widespread destruction in the city center hit New Zealand South Island city of Christchurch.
A.caused
B.cause
C.causing
D.having caused
594.After playing in the park for a few hours,the pupils gathered under trees _______shade and ______ down to eat their picnic lunch.
A.provided;sit
B.providing;sitting
C.providing;sat
D.provided;sat
593.答案是C;考查非谓语动词。此题causing作定语修饰earthquake。
594.答案是C;考查非谓语动词。第一空providing作trees定语，且主动关系；第二空sat和前面gathered并列，作谓语。
