The visitors were surprised to see so many buildings going u

The visitors were surprised to see so many buildings going up at the same time。参观者惊奇地看到,许多建筑物在同一时期拔地而起。see 。sb do /doing do 原形表示看到全过程,doing 表示看的时候,“正在做”；显然,看不到全过程,而且,拔地而起,是进行意义。