Question

---How long is it _____ we last met?--- About five years. You haven’t changed much. A．before.

---How long is it _____ we last met?--- About five years. You haven’t changed much. A．before B．since C．when D．that

Answer 1

B

连词辨析。Before在……之前；since自……以来；when当……时候；that，那个引导限制性定语从句。根据题意，根据下文，大约五年了，你没多大变化。可知上文要表达的意思是，自从我们上次见面有多久了？故选B。