进行贸易时我们应该注意文化差异。attentionWe must ________________ cultural differences when doing business.
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我们刚才碰到了一位多年不见的老朋友。come acrossJust now we ______________ an old friend we haven’t seen for years.
大卫把每幅图片和图片说明都研究了两遍。captionDavid has read each picture and ____________ twice with great care.
这些防火小贴士告诫我们什么该做,什么不该做。warnThese fire tips warn us _____________ and what not to do.
你能提供证据来表明他当时不在办公室吗?evidencCan you______________ to show that he was not in the office at that time?