摘要：23．-Is there anything wrong with you, Jake? You look so pale． -I feel very tired．I on this boring paper every day so far this month． A．work B．have been working C．had been working D．am working
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—Is there anything wrong with you, Jake? You look so pale．
—I feel very tired．I _____on this boring paper every day so far this month．
A.work B.have been working C.had been working D.am working
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—Is there anything wrong with you, Jake? You look so pale．
—I feel very tired．I _____on this boring paper every day so far this month．
| A．work | B．have been working | C．had been working | D．am working |