Passage 1

The IMF believes that economic growth is picking up,sounds familiar.

April is the cruelest month,breeding lilacs out of the dead land,and,in Washington,chirpy forecasts from the IMF that often prove a bit too chirpy.On April 18th the fund released its semi-annual World Economic Outlook(WEO),raising its forecast for global growth in 2017 to 3.5%.Growth forecasts for the emerging world have not changed.The IMF's global optimism is based instead on hopes of increased growth in the rich world.

The fund takes a rosy view of the American economy,citing both high levels of consumer confidence and Donald Trump's plans for more government spending.

In Britain the IMF now reckons GDP will grow by 2.0%in 2017,up from earlier estimates of 1.5%(issued in January)and 1.1%(last October).The IMF has also raised its forecasts for Japan and the euro area.

Snipers point out that IMF forecasts have been far from perfect.Some glitches are excusable.In the spring of 1990,it predicted that Kuwait's economy would grow by 0.8%that year.It actually fell by 26%.

What’s the main idea of this passage?(　　)