1d) was designed (long time ago so past tense)
2d) Has been repaired (It is still going on the present, this year)
3c) Had discovered (He discovered America long time ago)
4a) To have worked (worked long ago when he was young)
Hope it helps!
Answer:
c, the weather has suddenly changed.
<span>The question is 'self interest motivate producers to offer ............ products. The correct option is B. In market situations, producers' self interest, which is the desire to make more profit, always motivate producers in supplying products that are more expensive. The profit margins of producing more of an expensive product is usually higher compared to other less expensive products.</span>
a group of two or three syllables is referred to as a foot.
https://www.google.com/url?sa=i&source=images&cd=&cad=rja&uact=8&ved=2ahUKEwjX2PiTydneAhUrm-AKHcd8BvUQjRx6BAgBEAU&url=http%3A%2F%2Fwww.mammothmemory.net%2Fenglish%2Fliterature%2Fstress%2Fiambic-pentameter-shakespeare.html&psig=AOvVaw0bE4scuhNLQAY3LQ4a7I_E&ust=1542480315301492
thatsan example