The ads were simple, but remarkably _______.
举一反三
- Rich Media Ads are far more effective than simple banner ads。( )
- The questions were so simple that he easliy passed the test.
- Audrey felt it was wicked that billions of children were simple joys and drowned in overwhelming misery.
- “The old car sputtered to the top of the hill; we were all relieved” is a simple sentence.
- Stone tools began to be replaced around 6,000 years ago by metal tools, who were used to build instruments and simple machines.（） A: began B: who C: to build D: simple