p144 3번

Karl Russell and Satchi Murayama joined Wentworth Consulting as soon as both of _______ resigned from Triumph Properties.

답은 (B) them인데요

(A) whom이 오답인 것에 대한 설명을 알고 싶습니다.

p154 2번

_______ some speakers are absent, the annual investors' conference will begin as scheduled.

보기에 있는 (B) So as의 뜻이 뭔가요?

p154 12번

After payment has been received, the furniture order will be shipped to the retailer's factory in Argentina.

굵게 표시된거요. 현재시제가 더 어울리는 거 같은데... 왜 현재완료가 쓰인거죠?

여기선 무슨 용법으로 쓰인건가요?

p175 13번

The office lease contract is not valid until it has been agreed upon by both the owner and tenant.

이것도 위에 있는 거랑 같은 질문입니다.