Question

38.______ table tennis was accepted as a regular part of the

Answer 1

until一般不放在句首,后面跟时间词或表示时间条件的状语或从句连用 .

not until:可放句首,但主句要用倒装.例如这句就是倒装句.再比如Not until the early years of the 19th century did man know what heat is.直到19 世纪初,人类才知道热能是什么.It is not until… that…这是一个强调结构.