III listen to the passage and fill in the blanks Challenging calling touch create properly Zhang Ming taught his parents how to use smartphones during the Spring Festival holiday, hoping they could stay in (1)____better using WeChat. But the learning process proved very (2) . After Zhang got back to work, his parents kept (3)____to ask him how to use it. And he couldn’t explain (4)____.He finally decided to (5)____a users’ manual for them by drawing up nine pages of detailed directions on how to use WeChat.