This company accepts two types of____ (pay) methods:by credit card or by bank transfer.

问题描述:

This company accepts two types of____ (pay) methods:by credit card or by bank transfer.

答案为paying.
这个句子中,of 为介词,介词后应使用动词的ing 形式,paying methods 是指付款方式,此句的中文意思是:
这家公司接受两种付款方式:信用卡付款或银行转账.